Aerating fuel-pump for explosive-motors.



J. SHAW.

AERATING FUEL PUMP FOR EXPLOSIVE MOTORS.

APPLICATION FILED N0v.17. I9I4.

Patented May 30,1916.l

- gli/I/ 3 IMJ WITNESSES TTORN JAMES SHAW, OF LODI, CALIFORNIA.

.AERATING FUEL-PUMP FOR EXPLOSIVE-MOTORS.

specification of Letters Patent.

Patented lllay 310i, Mlle?.

Application filed November 17, 1914. Serial No. 872,580.

To @ZZ whom t may concern:

Be it known that I, JAMES SHAW, a citizen of the United States, residing at Lodi, in the county of San Joaquin, State of California, have invented certain new and useful Improvements in Aerating Fuel-Pumps for Explosive-Motors; and I do declare the following to be a clear, full, and exact de scription of the same, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this application.

This invention relates to improvements in explosive motors generally and specifically for the fuel pump used in connection with motors commonly known as the high compression type which operate without 'the use of an ignition spark, the explosion being obtained by. the high compression and resultant heating of the oil.

The aim of the invention is to provide a fuel pump by means of which, with the action of the engine, the fuel will be automatically measured, aerated, compressed andl then delivered to the cylinder of the engine in a highly incandescent form.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purposes for which it is de signed.

These objects, I accomplish by means of such structure and relative arrangement of the parts as will fully appear by a perusal of the following specification and claims.

On the drawings, similar characters of reference indica-te corresponding parts in the several views.

Figure 1- is a view, partly in section, showing the aerated fuel pump, with the necessary pipe and port connections in the position assumed by the parts at the time when the plunger is at its farthest outward position. Fig. 2 is' a view partly in section of the aerated fuel pump in the position assumed by the parts when the plunger is numeral 1 indicates the cylinder of a motor and the numeral 9 the intake pipe thereof screw fastened into the cylindrical casing 8 of the pump having a water jacket space Sa surrounding the same and having also a centrally orificed annular chamber l running theI full length of the said casing and opening into an enlarged adjacent chamber 5 having a spring adjusting cap 6 screw fastened to the inclosing casing 7 thereof.

Slidable in the chamber el" I have provided a sleeve 8 having a centrally orificed annular chamber 9 and being further projected into the chamber 5 where it is provided with a` shoulder 10 and a bumper member 11. I Between the collar 10 and the said adjusting cap 6, I have provided a spring 14, the purpose of which will presw entl'y appear. Slidable in the aforementioned chamber 9 of the said sleeve member 8 I have provided a plunger rod 1'2 having an eye 13 upon one extremity thereof adaptable to any suitable connection with the operating mechanism of the motor to which the fuel pump is to be applied. with an engine and is in operation, being in that particular position as shown in Fig. 3 of the drawings. The plunger 12 having advanced to its maximum inward position will now start upon its outward stroke with the sleeve member 8 following immediately adjacent the end of the plunger, this move ment of the sleeve being occasioned by the expansion of the spring 14 working between the shoulder 10 and the cap G. During this 'outward movement a port 2a will be closed by the sleeve 8, a port 21 by the wall 3 of the pump casing and a port 15 in the sleeve 8 passing beneath a supply pipe 16 will receive a ,measured charge of fuel therefrom. Upon the continued backward movement of the parts the port 15 will be brought to rest immediately beneath a source of compressed air carried by a pipe 2O4 whereupon the sleeve 8 now having reached its maximum outward position will come to rest but the plunger 12 will continue to the position as shown in Fig. 1 uncovering the port 15 thereby allowing compressed air to blow the charge of fuel carried by the said port 15 down into the now open chamber 9 in the sleeve 8. The fuel is herewith aerated and mixed and the compressed air acting against the sleeve 8 will automatically cause it to move back against the spring 14 thereby moving the port 15 inwardly and closing it against further admission of air from the pipe 20.

Nowupon the returning inward stroke of Vplunger 12 commences the compression of the fuel in the chamber n 9 which, acting against the spring 14, will be compressed in amount according as the regulation of the Asaid spring. The plunger 12 will, upon r overtaking the port 15, close the same thereby entrapping the said port full of compressed air which upon the further movement of the sleeve 8 with the plunger 12 will be brought to the fuel inlet opening 16 vthe return stroke of the plunger.

and thereby allowed to escape into an inlet 18 in the inlet pipe 16, which is separated by a Vdiaphragm 19 from the fuel supply inlet 17. This charge of compressed air will Yloe lead to the top of a fuel supply tank 24 by'means of a pipe 25 and thereby create a pressure on the fuel in the tank causing the fuel to run down through a pipe 28 and a regulating valve 22 into the measuring port 15 which will carry the charge away upon The plunger will at thesame time have completed its stroke, compressed thev fuel the desired amount and discharged the same through the pipe 2 into the `cylinder of the motor.

port 21 now is closed, as this is the time of The explosion or power stroke ofthe motor.

'Upon the return stroke of the plunger the i tail the present and preferred construction Vof* the device, still in practice, such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined; by the appended claims. Y

Having thus described'my invention what I' claim as new andV useful and desire to secure by Letters Patent is:

1. A fuel pump of the character described @wies o!Y this patentmy be obtained for a compressed air inlet and an outlet, a

spring pressed sleeve slidable in said casing and having an opening adapted to register with said fuel and compressed air inlets and an opening adapted to register with said outlet, a plunger movable in said sleeve and adapted to control the open and closed positions of said openings and to compress the yfuel and compressed air admitted into said sleeve, as described.

3. A fuel pump of the character described comprising a casing having a fuel inlet and a compressed air inlet and an outlet, a sleeve having an opening adapted to register with said fuel inlet and compressed air inlet, and an opening adapt` ed to register with said outlet, a plunger movable in said sleeve and adapted to close communication between the first named opening in said sleeve and said sleeve when the same is in register with said fuel inlet and to open communication therefrom into said sleeve when the same is in register with said compressed air inlet, said plunger being adapted to close said opening after it has been in register with said compressed air inlet, and to compress the air and fuel within said sleeve, and to move said sleeve to bring the second named opening into register with said outlet, as described.

In testimony whereof I affix my signature in presence of two witnesses.

' JAMES SHAW'.

Titnesses STEPHEN N. BLEWETT, FLOYD M. BLANCHARD.

ve cents each, by addressing the Commissioner et Patenti. Washington, D. c." 

